JP2014241133A - Light-emitting touch-switch device and light-emitting touch-switch module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting touch-switch device and a light-emitting touch-switch module having relatively large sensing area and capable of emitting light efficiently.SOLUTION: A light-emitting touch-switch device 20 includes a first circuit board 2, a cap unit 3 and a light-emitting element 4. The first circuit board 2 is electrically coupled to a sensing chip. The cap unit 3 is disposed on the first circuit board 2 and that is at least partially made of an electrically conductive plastic material having a resistance of equal to or smaller than 1×10Ω. The cap unit 3 and the first circuit board 2 cooperate to define a receiving space. The light-emitting element 4 is disposed in the receiving space and is coupled to the first circuit board 2. A light-emitting touch-switch module couples devices including the light-emitting touch-switch device 20 with a second circuit board.

Description

  The present application claims the priority of Chinese Patent Application No. 201310185960.5 filed on May 17, 2013.

  The present invention relates to a touch switch device and a touch switch module, and more particularly to a light emitting touch switch device and a light emitting touch switch module.

  U.S. Pat. No. 7,515,140 discloses a capacitive sensor that includes a metal spring defining a central opening in which a light emitting diode is placed and acts as a meter. However, a spring made of a non-light transmissive metal shields most of the light emitted from the light emitting diode, thereby reducing the light emitting efficiency of the light emitting diode. Furthermore, the capacitive sensor has a relatively small detection area.

US Pat. No. 7,515,140

  Accordingly, an object of the present invention is to provide a light emitting touch switch device that has a relatively large detection area and efficiently emits light.

  Another object of the present invention is to provide a light emitting touch switch module that has a relatively large detection area and efficiently emits light.

FIG. 1 is a partially exploded perspective view of a light emitting touch switch device according to a first preferred embodiment of the present invention, and a light emitting element electrically connected to a first circuit board using SMT (Surface-Mount Technique). Indicates. FIG. 2 is a cross-sectional view of a first preferred embodiment of a light emitting touch switch device along AA of FIG. FIG. 3 is a bottom view of the first preferred embodiment of the light emitting touch switch device, showing that the detection chip is disposed on the lower surface of the first circuit board. FIG. 4 is a partially exploded perspective view of the light emitting touch switch device according to the second preferred embodiment of the present invention. FIG. 5 is a cross-sectional view of a light emitting touch switch device according to a preferred second embodiment. FIG. 6 is a partially exploded perspective view of a modification of the light emitting touch switch device according to the first preferred embodiment, showing a light emitting element electrically connected to the first circuit board by wire bonding. FIG. 7 is a partially exploded perspective view of a modified example of the light emitting touch switch device of the second preferred embodiment, showing a light emitting element electrically connected to the first circuit board by wire bonding. FIG. 8A is a cross-sectional view of a light emitting touch switch device according to a preferred third embodiment of the present invention, wherein the first extension portions of the cap unit are engaged with the through holes of the first circuit board by interference fits, respectively. It shows that. FIG. 8B is a view similar to FIG. 8A showing an alternative configuration of the preferred third embodiment. FIG. 9 is a cross-sectional view of a modified example of the light emitting touch switch device of the third preferred embodiment, wherein the first extension portion engages with the through hole by high temperature compression or normal temperature compression, respectively, and the first extension portion is It shows protruding from the lower surface of the first circuit board. FIG. 10 is a cross-sectional view of another variation of the light emitting touch switch device of the preferred third embodiment, wherein the first extension portion engages with the through hole by high temperature compression or normal temperature compression, respectively, and the first extension Indicates that the portion is coplanar with the lower surface of the first circuit board. FIG. 11 is a cross-sectional view of a fourth preferred embodiment of the present invention, showing that the light emitting touch switch device is connected to the second circuit board by auxiliary pins. FIG. 12 is a cross-sectional view of a modification of the light emitting touch switch device according to the fourth preferred embodiment. FIG. 13 is a cross-sectional view of another modification of the light emitting touch switch device according to the fourth preferred embodiment. FIG. 14 is a partially exploded perspective view of the light emitting touch switch module according to the first embodiment of the present invention. FIG. 15 is a cross-sectional view of the light emitting touch switch module according to the first preferred embodiment. FIG. 16 is a partially exploded perspective view of the light emitting touch switch module according to the second preferred embodiment of the present invention. FIG. 17 is a cross-sectional view of the light emitting touch switch module according to the second preferred embodiment. FIG. 18 is a partially exploded perspective view of the light emitting touch switch module according to the third preferred embodiment of the present invention. FIG. 19 is a cross-sectional view of a light emitting touch switch module according to a preferred third embodiment.

  Other features and advantages of the present invention will become apparent in the following detailed description of preferred embodiments with reference to the accompanying drawings.

  Before the present invention is described in detail, it should be noted that similar elements are designated by the same reference numerals throughout the specification.

  With reference to FIGS. 1-3, a preferred first embodiment of a light emitting touch switch device 20 configured for use with a detection chip 84 is shown (see FIG. 3). The detection chip 84 generates a touch detection signal as a result of placing a conductive object (eg, a finger) near or in contact with the light emitting touch switch device 20. The touch detection signal can be used to activate an external electronic device.

  The light emitting touch switch device 20 of the preferred first embodiment includes a first circuit board 2, a cap unit 3 and a plurality of light emitting elements 4.

  The first circuit board 2 has an upper surface 212 and a lower surface 213, and is formed with at least one through hole 211 in which the metal layer 221 is disposed. More specifically, the metal layer 221 is formed in the through hole 211 and has a portion covering a through hole defining surface that defines the through hole 211, and further on the upper and lower surfaces 212 and 213 of the first circuit board 2. Each has an attached portion. The metal layer 221 is substantially made of copper, and is disposed on the through hole defining surface so as not to block the through hole 211 as a whole. In this embodiment, the first circuit board 2 is a printed circuit board.

The cap unit 3 made of light-reflective material includes a frame segment 32 disposed on and electrically connected to the first circuit board 2 and made of a conductive plastic material. To be effectively applied to a touch switch device, the resistance of the frame segment 32 should be 1 × 10 ⁵ Ω or less, preferably 1.5 × 10 ² Ω to 2.1 × 10 ³ Ω. is there. The frame segment 32 is in the form of a surrounding wall in this embodiment. The cap unit 3 further includes a cover segment 31 connected to the frame segment 32. In this embodiment, the cover segment 31 is made of the same material as the frame segment 32, and the cap unit 3 is integrally formed as a single piece. The cap unit 3 defines an accommodation space 33 in cooperation with the first circuit board 2. In this embodiment, the frame segment 32 is electrically and physically connected to the first circuit board 2 by having the pin 35 inserted into the through hole 211. The metal layer 221 formed on the surface defining the through hole is electrically connected to the pin 35 in order to ensure electrical connection between the pin 35 and the first circuit board 2. The pin 35 is made of a metal material such as copper. Preferably, the pin 35 is made substantially of copper and is coated with a steel layer.

  The light emitting element 4 is disposed in the accommodation space 33 and is electrically connected to the first circuit board 2. The light emitting element 4 emits light in a direction away from the first circuit board 2 after receiving the touch detection signal. In this preferred embodiment, there are six light emitting elements 4, but the light emitting touch switch device 20 of the present invention may include only a single light emitting element 4 depending on the practical requirements. The cap unit 3 is made of a light reflective material, and the light emitted from the light emitting element 4 can be reflected by the cap unit 3. As a result, the luminous efficiency of the light emitting touch switch device 20 can be increased by the cap unit 3.

  The cover segment 31 has a light transmissive pattern region 311 located on the light emitting element 4, and light emitted from the light emitting element 4 can pass through the light transmissive pattern region 311, and the light emitting touch switch device 20. Can function as a patterned button for physical contact by the operator. Furthermore, the light emitted from the light emitting element 4 can pass through the light transmission pattern region 311 of the cover segment 31, and the patterned button can function as a measuring instrument for facilitating the operation.

  When the conductive object is placed near or in contact with the frame segment 32 of the cap unit 3, the detection chip 84 detects a change in the capacitance of the frame segment 32 and generates a touch detection signal, Is then transmitted to the light emitting element 4 to drive the light emitting element 4 to emit light. Basically, the touch detection signal causes a change in the state of the light emitting element 4 such as from an “off” state to an “on” state.

  In this embodiment, the touch detection signal results from detection of a change in capacitance of the frame segment 32 of the cap unit 3. According to the following formula for measuring the capacitance between two electrodes of a capacitor: C = εA / d, ε represents the dielectric constant of the medium between the electrodes, A represents the area of the electrode, d is Represents the distance between electrodes. In the case of the light emitting touch switch device 20 of the present invention, the conductive object and the frame segment 32 of the cap unit 3 act as electrodes, and d can be very small compared to a normal touch switch device. Specifically, since the cap unit 3 is made of a conductive plastic material, the upper surface of the frame segment 32 can act as one of the electrodes of the capacitor. The conductive object can act as the other electrode of the capacitor. Accordingly, the distance d between the electrodes is relatively small. On the other hand, in the conventional touch switch device, the detection pad is usually disposed on the circuit board and is not located on the upper surface of the frame segment of the cap unit. Therefore, the distance d between the electrodes of the equivalent capacitor for the conventional touch switch device is relatively large, and the strength of the touch detection signal is weak compared to the present invention. In other words, the intensity of the detected change in capacitance of the cap unit 3 of the light emitting touch switch device according to the present invention is improved, resulting in an improved touch detection signal. Further, by using various conductive plastic materials, the dielectric constant can be changed to further improve the touch detection signal.

  More specifically, the cap unit 3 of this embodiment is formed by injection molding using a conductive plastic material. The conductive plastic material is a general polymer material (such as PC and PA) mixed with micro-sized metal fibers or particles, or is itself conductive due to a predetermined bonding structure of its molecular segments. It can be composed of a polymeric material. In this embodiment, the conductive plastic material is made of a polycarbonate resin mixed with 10 wt% stainless steel fibers.

  In addition to inserting the pin 35, it is worth noting that the frame segment 32 of the cap unit 3 may have an extension that engages the through hole 211 using an interference fit, hot compression or cold compression. Preferably, in order to collect the light emitted from the light emitting element 4, the cap unit 3 extends from the cover segment 31 toward the first circuit board 2, defines a space in the accommodation space 33, and emits light. It may further include an inner wall 34 that surrounds the light emitting element 4 so as to further collect the light emitted from the element 4 and pass it through the light transmission pattern region 311 of the cover segment 34. In particular, the inclination angle defined by the inner wall 34 and the first circuit board 2 can further collect the light emitted from the light emitting element 4. In this embodiment, the inner wall 34 is also made of a conductive plastic material, extends toward the first circuit board 2 and is electrically coupled to the first circuit board 2, thereby the frame segment 32 and the detection. It functions to improve the sensitivity of the detection mechanism constituted by the chip 84.

  In this embodiment, the light emitting touch switch device 20 may further include a sealing resin 5 that fills the accommodation space 33 in order to seal the light emitting element 4. The sealing resin 5 can increase the coupling strength between the cap unit 3 and the first circuit board 2 in addition to diffusing and mixing well the light emitted from the light emitting element 4.

  Since the cap unit 3 of the present invention is made of a conductive plastic material, the cap unit 3 of this embodiment is free of moisture-induced oxidation and does not require a conventional coating. On the other hand, since the detection pad for the conventional touch switch device is usually made of metal, the detection pad is easily oxidized by moisture. Furthermore, since the cap unit 3 of the present invention is conductive, the touch detection area can thereby extend to the entire surface of the cap unit 3.

  As shown in FIG. 3, the detection chip 84 is disposed on the lower surface 213 of the first circuit board 2 in this embodiment. However, as long as the detection chip 84 is electrically coupled to the frame segment 32 of the cap unit 3 that cooperates to form the touch detection mechanism, the detection chip 84 is connected to the upper surface 212 of the first circuit board 2 (FIG. 2). Reference).

  With reference to FIGS. 4 and 5, the light emitting touch switch device 20 of the preferred second embodiment is shown as well as the first preferred embodiment. The difference between them is that the frame segment 32 and the cover segment 31 in the form of a surrounding wall are separate objects.

  Furthermore, in other embodiments, the cover segment 31 is made of a material different from the material of the frame segment 32 and can be a plastic or metal plate so that the cover segment 31 obtains various patterns on the upper surface of the cap unit 3. It can be easily replaced.

  In a preferred second embodiment, since the cap unit 3 is formed by two separate elements, there is no need to redesign the molding device for the entire cap unit 3. Thus, the manufacturing costs can be reduced in the light emitting touch switch device 20 of the preferred second embodiment.

  Note that the cap unit 3 has a minimum length of 1 mm, a minimum width of 1 mm, and a minimum height of 0.5 mm to ensure that the cap unit 3 can detect physical contact of a conductive object. Should. It should also be noted that the minimum size of the cap unit 3 is not limited at all.

  Specifically, the light emitting element 4 may be an LED die or an LED package. As shown in FIGS. 1 and 4, when the light emitting elements 4 are LED packages, they can be electrically connected to the first circuit board 2 by using a surface mounted technology (SMT). . 6 and 7, when the light emitting elements 4 are LED dies, they can be electrically connected to the first circuit board 2 by wire bonding.

  Referring to FIG. 8A, a preferred third embodiment of a light emitting touch switch device 20 according to the present invention is shown as well as the preferred first embodiment. The difference between them is that the frame segment 32 of the cap unit 3 is connected to the first circuit board 2 using physical contact having surface roughness, and further from the cover segment 31 toward the first circuit board 2. It includes at least one first extension portion 36 that extends and is connected to the first circuit board 2. Specifically, in this embodiment, the frame segment 32 is configured to increase the contact area between the first circuit board 2 and the frame segment 32 and reduce the ohmic contact resistance generated between them. It has a rough lower surface 321 that physically contacts and is electrically connected to one circuit board 2. In this embodiment, the first extension portion 36 is disposed in the accommodation space 33. Specifically, the first extension portion 36 is disposed between the frame segment 32 and the inner wall 34.

  Referring to FIG. 8B, in an alternative arrangement of the preferred third embodiment, the light emitting touch switch device 20 includes a rough lower surface 321 and a first surface of the frame segment 32 to further improve the sensitivity of the light emitting touch switch device. Further, a conductive layer 37 interposed between the upper surface 213 of the circuit board 2 is further included. In this embodiment, the conductive layer 37 is made substantially of a metallic material.

  In this embodiment, the first extension 36 of the cap unit 3 is connected to the first circuit board 2 by an interference fit, where the electrical connection between the first circuit board 2 and the cap unit 3 is improved. As such, the first extension 36 is inserted into the through hole 211 that penetrates the printed circuit board 2 to electrically connect to the metal layer 221 formed on the through hole defining surface that defines the through hole 211. .

  Referring to FIGS. 9 and 10, the first extension portion 36 of the cap unit 3 can be engaged with the through hole 211 by high temperature compression or normal temperature compression.

  Furthermore, in other embodiments of the present invention, there may be multiple sets of first extensions 36, through-holes 211 and metal layers 221. It should be noted that, as shown in FIG. 10, the through hole 211 may be a stepped hole for increasing the contact area between the metal layer 211 and the first extension portion 36, and preferably, It is a step-like shape at a height (from the lower surface 213) in the range from one third to one half of the thickness of one circuit board 2. Accordingly, the capacitance of the touch detection signal for the light emitting touch switch device can be improved by increasing the contact area between the metal layer 221 and the first extension 36. Furthermore, the first extended portion 36 protrudes from the lower surface 213 of the first circuit board 2 (see FIG. 9) or is flush with the lower surface 213 (see FIG. 10) when engaged with the through hole 211. obtain. With respect to the first preferred embodiment, the metal layer 221 may extend to the upper and lower surfaces 212, 213 of the first circuit board 2.

  Referring to FIG. 11, a light emitting touch switch device 20 of a preferred fourth embodiment according to the present invention is shown as well as a preferred third embodiment. The difference between them is that the preferred fourth embodiment of the light emitting touch switch device 20 is connected to the first circuit board 2 and is configured to engage the second circuit board 81 of the light emitting touch switch module. The frame segment 32 of the cap unit 3 extends toward the second circuit board 81 and has a second extension portion 38 connected to the second circuit board 81. It is a point to have.

  More specifically, the second extension 38 of the frame segment 32 extends to reach the upper surface of the second circuit board 81, and the auxiliary pin 7 is connected to the lower surface of the second circuit board 81. It extends toward the second circuit board 81 so as to protrude from the second circuit board 81 and penetrates through the second circuit board 81. By utilizing the auxiliary pin 7, a preferred fourth embodiment of the light emitting touch switch device 20 can be removably engaged with the second circuit board 81 using a plug / pull operation.

  Further, referring to FIG. 12, when the light emitting touch switch device 20 is connected to the second circuit board using the auxiliary pins 7, in order to improve the structural strength of the light emitting touch switch device 20, the first One extension portion 36 engages the through hole 211 of the first circuit board 2 using an interference fit, and the second extension portion 38 also engages the second circuit board 81 using an interference fit. Engage.

  FIG. 13 is a modification of FIG. 11 in which the first protrusion 36 is engaged with the first circuit board 2 by interference fit. When the light emitting touch switch device 20 is connected to the second circuit board 81 by the auxiliary pin 7, the second extension portion 38 has the second extension so as to improve the structural strength of the light emitting touch switch device 20. The circuit board 81 is disposed on the upper surface.

  In summary, the first and second extension portions 36 and 38 of the cap unit 3 are respectively fitted into the first and second circuit boards 2 and 81 using one of interference fit, high temperature compression and normal temperature compression. Engage and electrically connect, the frame segment 32 of the cap unit 3 can also be connected to the first circuit board 2 by insertion of metal pins or physical contact using surface roughness.

  Referring to FIGS. 14 and 15, the touch switch module of the preferred first embodiment is configured to be electrically connected to an electronic device (not shown), and is disposed near or in contact with the electronic device. A detection signal is generated as a result of the conductive object being applied. The light emitting touch switch module includes a light emitting touch switch device 20 including the cap unit 3 and the first circuit board 2 (see FIGS. 1 to 13 for details and modifications), a second circuit board 81, a detection chip 84, and a cover 83. Including. In this embodiment, the detection chip 84 may be disposed on the upper surface 813 of the second circuit board 81.

  The housing member 82 is disposed on the upper surface 813 of the second circuit board 81 and interconnects the second circuit board 81 and the cover 83. The housing member 82 is formed having a through hole 821, and defines a device housing space 822 in cooperation with the second circuit board 81. The light emitting touch switch device 20 is housed in the device housing space 822 and electrically connected to the detection chip 84. The housing member 82 may protect the light emitting touch switch device 20 from side damage. The housing member 82 is made of a light reflecting material.

  The cover 83 is disposed on the housing member 82 and the second circuit board 81 and is provided with a light transmission pattern. The light transmission pattern is located on the light emitting element 4 of the light emitting touch switch device 20 or the second circuit board 81. Allow light emitted from other luminescent compounds to pass therethrough. Furthermore, the cover 83 is waterproof, and can prevent components disposed under it from being scratched. In this embodiment, the cover 83 is made of a plastic material.

  The detection chip 84 is electrically connected to the frame segment 32 of the cap unit of the light-emitting touch switch device 20, and generates a detection signal when the detection chip 84 detects a change in the capacitance of the frame segment 32, thereby 4 emits light after receiving the detection signal from the detection chip 84. The external electronic device can be further controlled to be switchable between an on state and an off state by a detection signal of the detection chip 84.

  Referring to FIGS. 16 and 17, the light emitting touch switch module of the preferred second embodiment is shown in the same manner as the preferred first embodiment. The difference between them is that the second circuit board 81 is formed with an opening 814 that appears in the through hole 821 of the housing member 82 and penetrates the second circuit board 81, and cooperates with the through hole 821 to form a device housing space. The light emitting touch switch device 20 is inserted into the device receiving space 822 (that is, the opening 814 and the through hole 821) at least partially by inserting it from the lower side of the second circuit board 81. Be contained. In this embodiment, the light emitting touch switch device 20 is housed in the device housing space 822 except for the first circuit board 2 so as to give a streamlined and smooth appearance.

  With reference to FIGS. 18 and 19, the light emitting touch switch module of the preferred third embodiment is shown in the same manner as in the first embodiment. The differences between them are described below. The light emitting touch switch module of the second preferred embodiment includes a plurality of touch switch devices 20, and the cover 83 is made of a conductive material. The light emitting touch switch module further includes a ground member 85 disposed on the metal pad 811 of the second circuit board 81 and electrically connected to the cover 83, and the ground member 85 together with the metal pad 811 and the cover 83 is a ground circuit. Form.

  In this embodiment, the cover 83 is grounded due to the presence of the ground member 85, and each of the light emitting touch switch devices 20 is interfered by a touch detection signal or an electrical signal generated from another light emitting touch switch device 20 in proximity thereto. Without being able to operate independently. Furthermore, the grounding member 85 avoids a short circuit of the cover when the cover 83 is made of a conductive material.

  In summary, the frame segment 32 of the cap unit 3 of the present invention is made of a conductive plastic material by injection molding, has no oxidation caused by moisture, and does not require a conventional cover. Furthermore, the touch detection area is enlarged due to its conductive properties. By incorporating the light emitting element 4 having the detection chip 84 into the light emitting touch switch device 20 under the frame segment 32, a touch detection area having a touch detection function can be illuminated. Further, by providing the frame segment 32 with a rough lower surface 321 that physically contacts the first circuit board 2 (or contacts the first circuit board via the conductive layer 37), the first circuit board 2 And the ohmic contact resistance between the frame segments 32 can be reduced.

  Although the present invention has been described in connection with the most realistic and preferred embodiments, the invention is not limited to the disclosed embodiments and all such modifications and equivalents are described. It will be understood to include various constructions that fall within the spirit and scope of the broadest interpretation, including any construction.

2 circuit board 3 cap unit 4 light emitting element 5 sealing resin 7 pin 20 light emitting touch switch device 31 cover segment 32 frame segment 33 receiving space 34 inner wall 35 pin 36 first extension portion 37 conductive layer 38 second extension portion 81 circuit Substrate 82 Housing member 83 Cover 84 Detection chip 85 Grounding member 211 Through hole 212 Upper surface 213 Lower surface 221 Metal layer 311 Light transmission pattern region 321 Rough surface 811 Metal pad 814 Opening portion 821 Through hole 822 Device accommodation space

Claims (10)

A first circuit board configured to be electrically connected to the detection chip;
A cap unit disposed on and electrically connected to the first circuit board and at least partially made of a conductive plastic material having a resistance of 1 × 10 ⁵ Ω or less, for forming a touch detection element A cap unit configured to cooperate with the detection chip and cooperate with the first circuit board to define a receiving space;
A light emitting element disposed in the housing space and electrically connected to the first circuit board;
With
When the touch detection element detects a change in capacitance of the cap unit as a result of a conductive object being placed near or in contact with the cap unit, the light emitting element is: A light emitting touch switch device that emits light after receiving a touch detection signal generated by the detection chip.   The cap unit is connected to the first circuit board in a frame segment in the form of a surrounding wall, and is connected to the frame segment, so that light emitted from the light emitting element can pass through the light transmission pattern region. The light emitting touch switch device according to claim 1, further comprising a cover segment having the light transmission pattern region.   The light emitting touch switch device of claim 2, wherein the cover segment and the frame segment are integrally formed as a single piece and made of the same conductive plastic material. The cap unit includes a frame segment in the form of an enclosure connected to the first circuit board;
The first circuit board has an upper surface and the frame segment has a rough lower surface;
The light emitting touch switch device of claim 1, further comprising a conductive layer interconnecting a rough lower surface of the frame segment and an upper surface of the first circuit board.   The light emitting touch switch device penetrates the first circuit board so that the first circuit board is formed with a through hole, and the cap unit is electrically connected to the first circuit board. The light emitting touch switch device of claim 1, further comprising a pin inserted into the hole.   The light-emitting touch switch device includes the detection chip, and the detection chip is disposed on a lower surface of the first circuit board and is electrically connected to the first circuit board. Luminous touch switch device.   A plurality of auxiliary pins connected to the first circuit board and configured to be engaged with the second circuit board, wherein the cap unit extends toward the second circuit board; The light emitting touch switch device of claim 1, further comprising: a second extension portion configured to contact and extend into or into it. A first circuit board and a cap unit that is disposed on the first circuit board and is electrically connected to the first circuit board, and having a resistance of 1 × 10 ⁵ Ω or less And a cap unit cooperating with the first circuit board to define a receiving space, and a light emission disposed in the receiving space and electrically connected to the first circuit board. A light emitting touch switch device comprising: an element;
A second circuit board connected to the light emitting touch switch device;
A detection chip disposed on one of the first and second circuit boards and electrically connected to the cap unit, wherein the detection chip cooperates with the cap unit to form a touch detection element; and A cover disposed on the second circuit board;
With
When the detection chip detects a change in the capacitance of the cap unit as a result of a conductive object being placed near or in contact with the cap unit, the detection chip detects a touch detection signal. The light emitting touch switch module emits light after the light emitting element receives the touch detection signal from the detection chip. The cover is electrically conductive;
The light emitting touch switch module further includes a ground member provided on the second circuit board and electrically connected to the cover,
The light emitting touch switch module according to claim 8, wherein the second circuit board further includes a metal pad on which the ground member is disposed. A housing member interconnecting the cover and the second circuit board and having a through hole for housing the light emitting touch switch device;
The second circuit board has an opening that appears in the through hole of the housing member and is formed therethrough, and the light emitting touch switch device is at least partially housed in the opening and the through hole. The light emitting touch switch module according to claim 8.

Images